/*
 * 版权所有 (C) 2015 知启蒙(ZHIQIM) 保留所有权利。[遇见知启蒙，邂逅框架梦，本文采用木兰宽松许可证第2版]
 * 
 * https://zhiqim.org/project/zhiqim_kit/zhiqim_git.htm
 *
 * ZhiqimGit is licensed under Mulan PSL v2.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */
package org.zhiqim.git.http;

import org.zhiqim.git.objer.objectid.ObjectId;

/**
 * 增量对象链表，继承自对象编号，利用ObjectId的equals&hashCode可直接使用indexOf查找
 *
 * @version v1.0.0 @author zouzhigang 2017-4-18 新建与整理
 */
class ReceiveDeltaChain extends ObjectId
{
    ReceiveDelta head;

    ReceiveDeltaChain(ObjectId id)
    {
        super(id);
    }

    /** 增加到链头 */
    void addHead(ReceiveDelta delta)
    {
        delta.next = head;
        head = delta;
    }
    
    /** 从链头移出对象 */
    ReceiveDelta removeHead()
    {
        ReceiveDelta delta = head;
        if (delta != null)
            head = null;
        
        return delta;
    }

}